56757109 has 2 divisors, whose sum is σ = 56757110. Its totient is φ = 56757108.

The previous prime is 56757091. The next prime is 56757131. The reversal of 56757109 is 90175765.

56757109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (56757091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31606884 + 25150225 = 5622^2 + 5015^2 .

It is a cyclic number.

It is not a de Polignac number, because 56757109 - 2⁷ = 56756981 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56757179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28378554 + 28378555.

It is an arithmetic number, because the mean of its divisors is an integer number (28378555).

Almost surely, 2^56757109 is an apocalyptic number.

It is an amenable number.

56757109 is a deficient number, since it is larger than the sum of its proper divisors (1).

56757109 is an equidigital number, since it uses as much as digits as its factorization.

56757109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 66150, while the sum is 40.

The square root of 56757109 is about 7533.7314127861. The cubic root of 56757109 is about 384.3026878664.

The spelling of 56757109 in words is "fifty-six million, seven hundred fifty-seven thousand, one hundred nine".